Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
van doan » van toan, van hoan, van dan
cham cuu » cap cuu, chat cua
tu sach » thu sach, su sach, tu cach
va cham » va chat, va tham
van cua » vang cua, ban cua, dan cua
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
te sach » toc sach
ma hoi » mai hoi, xa hoi, ma hoa
y nang » ky nang, ly nang, v nang
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (te sach)) y nang ma hoi. hieu va cham cuu ((van doan) or (van doanh)) van cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) y nang ma hoi. hieu va cham cuu ((van doan) OR (van doanh)) van cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) y nang ma hoi. hieu va cham cuu ((van doan) or (van doanh)) van cua te*".